Adobe 23101335 User Guide - Page 164

154 CHAPTER 5 Selecting Removing fringe pixels from a selection (Photoshop) When you move or paste an anti-aliased selection, some of the pixels surrounding the selection border are included with the selection. This can result in a fringe or halo around the edges of the pasted selection. These Matting commands let you edit unwanted edge pixels: • Defringe replaces the color of any fringe pixels with the colors of nearby pixels containing pure colors (those without background color). For example, if you select a yellow object on a blue background and then move the selection, some of the blue background is selected and moved with the object. Defringe replaces the blue pixels with yellow ones. • Remove Black Matte and Remove White Matte are useful when you want to paste a selection anti-aliased against a white or black background onto a different background. For example, anti-aliased black text on a white background has gray pixels at the edges, which are visible against a colored background. You can also remove fringe areas by using the Advanced Blending sliders in the Layer Styles dialog box to remove, or make transparent, areas from the layer. In this case, you would make the black or white areas transparent. Alt-click (Windows) or Option-click (Mac OS) on the sliders to separate them; separating the sliders allows you to remove fringe pixels and retain a smooth edge. To decrease a fringe on a selection: 1 Choose Layer > Matting > Defringe. 2 Enter a value in the Width text box for the distance to search for replacement pixels. In most cases, a distance of 1 or 2 pixels is enough. 3 Click OK. To remove a matte from a selection: Choose Layer > Matting > Remove Black Matte or Layer > Matting > Remove White Matte. 1 Adjust the view as needed: • To magnify an area, select the zoom tool ( ) in the dialog box, and click in the preview image. To zoom out, hold down Alt (Windows) or Option (Mac OS) as you click. • To view a different area, select the hand tool in the dialog box, and drag in the preview image. Extracting objects from their background (Photoshop) The Extract command provides a sophisticated way to isolate a foreground object and erase its background on a layer. Even objects with wispy, intricate, or undefinable edges may be clipped from their backgrounds with a minimum of manual work. Note: For simpler cases, you can instead use the background eraser tool.